Aerial insulated cable cross linked polyethylene insulation material containing graphene and cable

Abstract

The invention provides an aerial insulated cable cross linked polyethylene insulation material containing graphene and a cable and aims to achieve the effect of reducing the loss of transmitted electric energy. The aerial insulated cable cross linked polyethylene insulation material contains, by mass, 80-90 parts of low density polyethylene, 10-20 parts of linear low density polyethylene, 0.05-3.5 parts of a heat conduction agent, 1-5 parts of an assisting heat conduction agent, 0.5-3 parts of a silane coupling agent, 0.11-0.21 part of an antioxidant, 0.03-0.15 part of a plasticizer, and 0.03-0.15 part of an initiator. The aerial insulated cable is characterized in that an insulation layer is made of the aerial insulated cable cross linked polyethylene insulation material containing graphene. Through the combination of the heat conduction agent and the assisting heat conduction agent, the heat conductivity of the insulation layer material can be remarkably increased, so that the loss of transmitted electric energy can be reduced or the cable carrying capacity can be increased, the ultraviolet ray resistance and the weather resistance are improved and the service life of the insulation layer of the aerial insulated cable is prolonged.

Description

Technical field [0001] The invention relates to a cable insulating material and an aerial insulated cable made of the material, in particular to a cross-linked polyethylene insulating material and an aerial insulated cable made of the material. Background technique [0002] Overhead insulated cables (cables) are mainly used for overhead installation in urban and rural power distribution networks. The cables are exposed outdoors for a long time and are easily affected by various harsh environments, such as ultraviolet rays, high temperature, low temperature, etc. The insulation layer is easy to age, and ordinary cross-linked polymerization The addition of no less than 2.6% of carbon black to the vinyl insulating material still does not meet the requirements of the insulating material to resist ultraviolet rays and weather-induced aging, resulting in a reduction in the service life of the cable. The cable has only one insulating layer, and the heat dissipation is better than other ...

AI Technical Summary

Problems solved by technology

The important factor affecting the temperature of the cable conductor is the insulating layer outside the conductor, and the cross-linked polyethylene insulating layer material is a high heat-resistant material with a very low thermal conductivity of 0.2W / mk. The cross-linked polyethylene insulated overhead cable is in the air Working, the air temperature is 20°C, and in a windless environment, when the conductor temperature reaches 90°C, the cable surface temperature is only 60°C, and the temperature gradient from the conductor to the cable surface can reach 30°C, the heat dissipation is very poor, resulting in increased transmission power loss

Images